Taxonomy: Turtles & Tortoises

Reptile reproduction can be a confusing topic due to the variety of normal reproductive strategies found throughout different reptile species. Nevertheless it important to understand normal reproductive processes to correctly approach some commonly seen problems. The recording of this R.A.C.E.-approved, web-based seminar discusses normal reproductive strategies of reptiles, including important reproductive anatomy and physiology. Three clinically important conditions, pre-ovulatory or follicular stasis, post-ovulatory dystocia, and cloacal prolapse, are also explored in detail.

Even the most steadfast and seasoned veterinary anesthetist can find themselves intimidated by exotic animal patients. Standard veterinary anesthesia monitors are not designed to read the extremely high (or extremely low) heart rates and respiratory rates of some exotic animal patients. Despite these challenges, valuable information can be gathered from monitoring tools as well as hands-on techniques. Essential vital signs, such as heart rate and rhythm, respiratory rate and depth, body temperature, and mucous membrane color should all be evaluated.

Arterial blood pressure is a function of heart rate, blood volume, stroke volume, and arterial compliance. Indirect arterial blood pressure is most commonly measured by Doppler ultrasound or non-invasive oscillometric monitors. What are the limitations of indirect blood pressure measurements in exotic animal patients? How is this technique unique in exotic companion mammals when compared to dogs and cats? How is this technique performed in birds and can this procedure be used in reptiles?

Electrocardiography can be used to detect and diagnose arrhythmias and conduction abnormalities, particularly during long-term anesthesia. How are leads attached to exotic animal patients? And what is the normal appearance of normal electrocardiogram tracings in birds or reptiles?

Reptile dentition tends to be relatively uniform with a simple, conical shape. Most reptile teeth are loosely attached with the dental attachment most superficial in acrodontic species. Tooth loss and replacement is a normal occurrence in reptile species with pleurodont dentition, which includes snakes, and many lizards. Take special care when handling reptiles with acrodont dentition as teeth will not be replaced when infected or fractured. Additionally, periodontal disease is common in captive lizards with acrodont dentition such as bearded dragons and chameleons. Periodontal disease is an insidious condition. As plaque formation builds and gingivitis worsens, many reptiles will continue to eat. The owner may not observe problems until disease is quite advanced. Feeding lizards an unnatural, soft diet is believed to promote plaque development and the development of periodontal disease.

Diagnostic and therapeutic procedures cannot be administered until you and your staff can safely handle and restrain the turtle or tortoise patient. Many chelonian patients presented to the veterinary hospital are ill and therefore their temperament and strength level can be reduced. Normal, healthy chelonians tend to be bright, alert and very strong, making them extremely challenging to restrain. Gaining control of the head can be particularly difficult, however multiple techniques have been described.

Reptiles lack an epiglottis and the glottis is ready visualized, making intubation readily accomplished in most species. If the glottal folds are closed, apply topical lidocaine to facilitate intubation. The tracheal rings are complete in reptiles. Use of an inflated, cuffed endotracheal tube can lead to pressure necrosis because there is no elastic ligament to accommodate tracheal expansion. Always select an uncuffed endotracheal tube in small reptiles and never inflate a cuff in large reptiles …

This live webinar event was presented by Javier Nevarez, DVM, PhD, DACZM, DECZM (Herpetology). View a recording of Dr. Nevarez’s web-based seminar and earn 1 hour of R.A.C.E.-approved continuing education credit. Lecture objectives include a review of the principles and concepts of reptile analgesia, recommended analgesics, signs of pain and pain recognition, and a review of analgesic protocols. The presentation also reviews principles and concepts of reptile anesthesia, popular anesthetic agents and anesthetic protocols, monitoring, as well as keys to success.

Did you hear about the Palawan turtle crisis? In June 2015, Philippine authorities confiscated over 4,000 turtles, many of them critically endangered Philippine forest turtles (Siebenrockiella leytensis), intended for the illegal pet trade. Enjoy LafeberVet’s brief, fun slideshow that explores our Emeraid donation for the Palawan turtle crisis as well as care of many, many, many turtles. Although medical supplies are not currently required, financial contributions are still needed for this important conservation effort.

Part of a unique series on sea turtle veterinary medicine and wildlife rehabilitation, this article explores many components of the sea turtle physical exam. Evaluation of the shell is discussed in both cheloniids and leatherbacks (Dermochelys coriacea) as well as assessment of the cardiopulomonary system, skin, long bones and joints, cloaca and tail. Evaluation of the coelom by inguinal palpation is described as well as measurement of body temperature. Specialized testing such as neurologic and in-water examinations are also described. Common physical examination findings like fibropapillomas in green turtles (Chelonia mydas) and epibiota in loggerhead turtles (Caretta caretta) are also discussed. LOGIN to view references.

Sea turtles are adapted to their marine environment, and they possess unique anatomic and physiologic features that influence their restraint and handling in a veterinary medicine or wildlife rehabilitation setting. Techniques for handing small and large sea turtles are described as well as recommendations for handling aides and cautions to prevent iatrogenic injury. LOGIN to view references.

The mud turtle (Pelusios castaneus) is native to West Africa and its natural habitat consists of aquatic habitat surrounded by dense forest floors or submerged savannah. Shared by Dr. La’Toya Latney of PennVet, this educational handout will help your client understand how to care for and maintain this aquatic turtle species in captivity. Recommendations for indoor and outdoor housing as well as nutrition are described as well as common problems seen pet turtles.

The leopard tortoise (Geochelone pardalis) is found throughout the southern edge of the Sahara and in Southern Africa from the Sudan to Ethiopia. Leopard tortoises inhabit hot arid desert, scrublands, and savannah. Shared by Dr. La’Toya Latney of PennVet, this educational handout will help your client understand how to care for and maintain this tortoise in captivity. Recommendations for indoor and outdoor housing as well as nutrition and breeding are described as well as common clinical problems.

The charming Chinese box turtle (Cuora flavomarginata) is native to the rice patty and pond environments of Taiwan and southern China. Shared by Dr. La’Toya Latney of PennVet, this educational handout will help your client understand how to care for and maintain this semi-aquatic turtle in captivity. Recommendations for indoor and outdoor housing as well as nutrition and breeding are described as well as common clinical problems.

Sulcata or African spurred tortoises (Geochelone sulcata) are “gentle giants” found throughout the southern edge of the Sahara in Africa. Sulcata tortoises inhabit hot arid desert, scrubland, and savannah. Shared by Dr. La’Toya Latney of PennVet, this educational handout will help your client understand how to care for and maintain this popular tortoise in captivity. Recommendations for housing as well as nutrition, breeding, and common clinical problems are described.

Use our Mediterranean tortoise Basic Information Sheet to compare taxonomy, physical characteristics, differences in diet and housing needs, as well as preventive care and diseases of this group of chelonians. Login to view information sheet references.

The Egyptian tortoise (Testudo kleinmanni) is also know as Kleinmann’s tortoise or Leith’s tortoise. The native habitat of the Egyptian tortoise consists of desert and semi-desert scrub, although this species is also found in salt marsh margins, sandy gravel plains, as well as the rocky escarpments of the “wadis”, a stream bed that is usually dry except during the rainy season.

Use our Egyptian tortoise Information Sheet to review taxonomy, conservation status and physical description as well as diet and housing needs of this chelonian species. Login to view information sheet references.

The Greek or spur-thighed tortoise (T. graeca complex) is a small to medium-sized tortoise. Subspecies are found from northern Africa through central Asia. Use our Greek tortoise Information Sheet to review taxonomy, conservation status, physical description, diet and housing needs, as well as important medical conditions of this chelonian species. Login to view information sheet references.

The marginated tortoise (Testudo marginata) is found in Greece and Sardinia, as well as Italy, southern Albania and the Balkan Islands. This species was also introduced into Turkey. Its natural habitat consists of dry scrub, woodland, and hillside.

Use our marginated tortoise Information Sheet to review taxonomy, conservation status, physical description as well as diet and housing needs of this chelonian species. Login to view information sheet references.

The Egyptian tortoise (Testudo kleinmanni) is also know as Kleinmann’s tortoise or Leith’s tortoise. The native habitat of the Egyptian tortoise consists of desert and semi-desert scrub, although this species is also found in salt marsh margins, sandy gravel plains, as well as the rocky escarpments of the “wadis”, a stream bed that is usually dry except during the rainy season.

Use our Egyptian tortoise Information Sheet to review taxonomy, conservation status and physical description as well as diet and housing needs of this chelonian species. Login to view information sheet references.

The use of esophagostomy tubes (E-tubes) allows administration of oral medications and critical care nutrition to turtles and tortoises while minimizing stress and the risk of esophageal trauma associated with repeated rigid gavage tube feeding. Esophagostomy tubes are very well tolerated in chelonians and the patient can even eat normally with the tube in place. Patients can be medicated and fed on an outpatient basis, and once fully recovered, the E-tube is easily removed in the veterinary clinic.

A simple retweet of a turtle eye examination at the National Aquarium inspired a day of terrapin-friendly tweets by LafeberVet. Twitter topics ranged from turtle and tortoise ophthalmic anatomy to chelonian clinical problems like blepharedema, commonly associated with hypovitaminosis A in aquatic turtles.

High dietary levels of oxalic acid or oxalates may promote urolith or bladder stone formation in herbivores like the guinea pig and tortoise. The following chart shows the oxalate content in 100 grams of selected raw foods.

The lethargic, weak chelonian may exhibit a lack of carpal or truncal lift. It may sit flat on the exam table instead of lifting up on all four feet, and it may not be able to retract its head into the shell with the expected degree of strength. It can be challenging to…

Turtles and tortoises display a variety of dietary strategies ranging from the complete herbivory seen in many tortoises to the strict carnivory displayed in aquatic species like the snapping turtle. There are also many chelonians, such as the Eastern box turtle, that may be considered opportunistic omnivores. This review article, critiqued by reptile nutritionist, Susan Donoghue, discusses clinical concerns related to feeding the hospitalized turtle or tortoise. Topics covered range from recognizing true anorexia to food items to avoid. Practical technical concerns related to nutritional support such as tube feeding and daily caloric requirements are also discussed.

If you see reptiles in your clinical practice, you will encounter diarrhea in tortoises, and less commonly turtles. This paper describes the basics of case management beginning with anamnesis, continuing with information on the examination, tests and potential treatments and concluding with client education.

The basic principles of fluid therapy are the same in the reptile as seen in birds and mammals, however reptile anatomy and physiology make some features of this crucial supportive care procedure unique. This article reviews fluid resuscitation with the use of crystalloid fluids and colloids, indications for replacement fluids including signs of dehydration and osmolarity values reported in reptiles. Routes of fluid administration in reptiles are described include subcutaneous, oral, soaking, intracoelomic, intraosseous, and intravenous via the cephalic vein, jugular vein, and in rare instances intracardiac catheter placement. Patient monitoring, including blood pressure measurement and signs of overhydration, are also explored.

The left or right jugular vein is the vessel of choice in most chelonians less than 4 kg body weight. The risk of lymph dilution is low with this site. The phlebotomist holds the head and extends the head and neck, while an assistant supports the turtle’s body and holds off the jugular vein at the base of the neck. (With a small chelonian, it may easier to…

No single hospital environment can meet the needs of every exotic animal and caging systems must be tailored to meet the specific needs of each patient. Read about those caging requirements that remain constant among exotic animals as well as the species-specific needs of each taxa from birds and small mammals to fish, amphibians, and reptiles.

The paired ovaries and testes, which range in color from yellow to grayish-pink, are located dorsomedially within the coelom although their exact location is species-specific. The right gonad sits cranial to the left, particularly in snakes. Females possess a right and left oviduct, but no true uterus. The oviduct empties directly into the cloaca through a genital papillae

Among exotic animals, venous cutdown is most commonly employed in reptiles like lizards and snakes although intraosseous catheters are also placed in lizards. Similarly, when an exotic companion mammal like a ferret or rabbit suffers from severe hypovolemia, dehydration, hypotension, and vascular collapse, intraosseous catheters have largely replaced venous cutdowns but this technique is occasionally employed.

Common reproductive conditions of the reptile include prolapse of the cloaca, oviduct or copulatory organ, yolk coelomitis, dystocia or egg binding, as well as follicular stasis. This review article on twelve key facts explores clinically relevant anatomy and physiology and appropriate husbandry as well as key points of urgent care and general principles of case management.

Prolapse in reptiles can involve the cloaca, a common receiving chamber for the reproductive, urinary, and gastrointestinal tracts. Prolapses can also originate from the distal gastrointestinal tract, reproductive organ, or urinary bladder—in those species with a bladder like the green iguana and leopard gecko…

Aquatic turtles are personable, popular pets, however their upkeep can be labor intensive. This educational handout will help your client understand how to care for and maintain semi-aquatic turtle species such as sliders (Trachemys spp.), painted turtles (Chrysemys), pond turtles (Graptemys spp.) and aquatic turtles, like softshell turtles (Apalone spp.) and matamatas (Chelus fimbriata). Recommendations for diet, indoor and outdoor housing, as well as common problems seen in pet turtles are described.

Ear or aural abscess is extremely common in box turtles and aquatic or semi-aquatic turtles like red-eared sliders. This educational handout will help your client understand this clinical problem, the veterinary treatment commonly required as well as follow-up care and monitoring.

Shell fractures are one of the more common presentations of Chelonia to the private exotic animal practitioner. Shell fractures are frequently caused by vehicular trauma, lawn mowers, predation by dogs and raccoons, or drops from balconies or porches. I have even seen one case in which a person tried to use a tortoise […]

Box turtles are one of the most common reptile pets in the United States. There are many subspecies of the box turtle, with the Eastern box turtle and three-toed box turtle being most commonly kept as pets. This educational handout will help your client understand how to care for and maintain this species in captivity. Recommendations for pet turtle diet and housing, as well as common clinical problems seen in veterinary practice are described.

Red-eared sliders are native to the eastern and central United States river valleys. Most pet sliders are captive bred and hatched. Red-eared sliders are hardy and outgoing. Although pretty and personable as pets, red-eared sliders occupy a niche of dark history in herpetoculture, first as transmitters of Salmonella bacteria to small children, second as an invasive species that have disturbed ecosystems throughout the waterways of the world. The former problem is the result of husbandry and marketing practices of large-scale commercial producers; the latter due to illegal release of unwanted pets.

Box turtles are indigenous to North America. Free-ranging box turtles spend much of their time in woodland and grassy habitats, near streams or other water sources. Most box turtles offered for sale in the pet trade are…

The shell is a bony structure unique to order Chelonia. No other animal, living or extinct, has its body enclosed within a bony shell similarly constructed in its entirety. LafeberVet’s “Understanding the Chelonian Shell” describes pertinent shell vocabulary terms and explores shell function, morphology, growth, and pathology.

October 21st is Reptile Awareness Day. Although Reptile Awareness Day was founded with the worthy goal of exploring the ecological challenges that reptiles face, celebrate with LafeberVet by taking our quiz that focuses on clinical information. Are you aware of these reptile-centric facts that will benefit you, your staff, and of course your reptile patients?

The turtle ear is a simple structure that sits caudoventral to the eye covered by a large scale called the tympanic scute. As in many reptiles, the external ear is absent in chelonians. The tympanic membrane sits flush against the skin just underneath the tympanic scute. There is one ossicle, the columella, which crosses the large tympanic cavity to insert medially on the oval window of the cochlea. A narrow Eustachian tube connects the middle ear to the oropharynx.

Aural abscesses are well-encapsulated, caseous plugs that slowly develop until it fills the tympanic cavity. The cause of aural abscessation is not completely understood…

At the Ontario Turtle Conservation Centre, previously the Kawartha Turtle Trauma Centre, we encourage private practices, emergency clinics, and rehabilitation centers to aid in the initial treatment of these injured turtles. We admit turtles from across the province, and it is extremely beneficial to the turtle to get immediate care locally before transfer. Snapping turtles are incredible in their ability to heal (albeit slowly!) and we cannot stress enough that the injuries can appear horrific, and yet can go on to heal, with subsequent release of the turtle back into the wild…